JPH0212003B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a switch attached to a rotary electronic component that can easily distinguish between normal operating rotation of the rotary electronic component and switch operation based on the feel of the operating shaft. .

In recent years, with the miniaturization of electronic devices, there has been a strong demand for smaller electronic components, and electronic components are rapidly becoming smaller, but on the other hand, there is a desire for better characteristics than ever before. . However, not only single switches but also switches attached to other rotating electronic components such as variable resistors cannot be used with large, high-pressure springs as they become smaller. The difference in rotational torque of the operating shaft during normal operation of the rotating electronic component and when switching the attached switch has become small, and the switching of the attached switch is unclear, and it is unclear where the attached switch is working. It becomes difficult to determine whether it is present or not.

The present invention eliminates the above-mentioned conventional drawbacks, and provides a switch attached to a rotary electronic component that increases the switching driving force of the switch and can clearly distinguish between normal operating rotation and switch operation. It is.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a cross-sectional plan view of an accessory switch of a rotary electronic component in one embodiment of the present invention. In the figure, a switching piece 2 is connected to an operating shaft 1 through a non-circular hole 3 so as to rotate in conjunction therewith. On the same plane as the switching piece 2, a switching plate 4 is rotatably supported by studs 5. When the stepped portion 6 of the switching piece 2 is brought into engagement with the switching plate 4, the switching plate 4 engages with the step stud 5 in conjunction with the rotation of the switching piece 2.
Rotate around the fulcrum. One end of a spring 8 is attached to the tip 7 of the switching plate 4, and the other end is attached to the attachment hole 10 of the attachment plate 9. The spring 8 is formed into an arcuate shape, and is configured to perform a reversal operation when the switching plate 4 is in a neutral position, as shown in FIG. Fixed terminals 11 and 12 are attached to both sides of the switching plate 4 to restrict the range of movement of the switching plate 4 in the left and right directions. When the switching plate 4 is made of a conductive material, the contacts are switched by moving the switching plate 4 from side to side, thereby forming a switch. A protrusion 13 is provided at the end of the switching plate 4, and a protrusion 16 is provided on the opposing side wall 15 of the housing 14. A long hole 17 extending in the direction of the switching piece is provided in the fitting portion of the switching plate 4 with the step stud 5 serving as a rotation support portion.

Now, if the switch plate 4 is rotated counterclockwise as shown by arrow A in FIG. When the switching plate 4 starts rotating, the protrusion 13 of the switching plate 4 requires a force to climb over the protrusion 16 of the casing 14. This force becomes the driving force for switching the attached switch. When a force greater than this switch driving force is applied, the protrusion 13 of the switching plate will
The switching plate 4 begins to slide along the convex portion 16 of the housing, and is guided by the elongated hole 17 and lifted upward as shown by arrow C. Here, due to the expanding force of the spring 8, a force is always acting on the switching plate 4 in the direction opposite to the arrow C that tries to press the stud 5, so the switching plate 4 is pressed against the stud 5. There is no need for an extra spring, and a stronger switching driving force can be obtained. Further, when the switching piece 2 is rotated, the switching plate 4 comes to the neutral position as shown in FIG. Since the protruding part 13 of the switching plate 4 and the convex part 16 of the housing 14 are formed with gently curved surfaces or oblique parts, when they exceed the neutral position, they slide against each other, and the expanding force of the spring is applied to the switching plate. 4 is a sudden reversal. At this time, you can get a very light switching feeling.

In addition, when the switching plate 4 is in contact with the fixed terminal 11 or 12, the protruding portion 13 and the convex portion 1
6 are in contact with each other at their oblique portions, and as a result, they act to press down the fixed terminal 11 or 12,
The contact pressure between them also increases. Here, if the convex portion 16 of the housing 14 is formed to have elasticity, this effect will be even greater.

Although not shown in the drawings, even if the switch is configured such that the mounting hole 10 side of the spring 8 is attached to a separate movable piece, and the movable piece opens and closes the switch using one end as a fulcrum, the above-described embodiments will not be applied. You can get the same effect as . Further, instead of the projection 13 and the projection 16, the relationship may be that of the projection 13 and the projection.

FIG. 3 shows a variable resistor equipped with a switch attached to the rotary electronic component of this embodiment. 2 and performs a switch operation in conjunction with the variable resistor storage section 19.

As explained above, in the accessory switch for the rotary electronic component of the present invention, the protrusion provided at one end of the switching plate and the protrusion provided on the housing engage with each other, and the protrusion on the switching plate engages with the protrusion provided on the housing. The switching plate is lifted up along the elongated hole by riding on the convex part, and by further deflecting the spring that biases the switching plate, the switching force is stored to the maximum, increasing the repulsive force of the spring, By increasing the repulsive force, the switching force of the switch is increased, so it is possible to clearly distinguish between normal rotation and operation of the attached switch by the feel of the operating shaft, and the structure is simple. It has great practical value.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional plan view of a switch attached to a rotary electronic component showing an embodiment of the present invention, Fig. 2 is a plan view of the switch during operation, and Fig. 3 is a diagram of a variable resistor equipped with the switch. FIG. 1...operation axis, 2...switching piece, 4...switching plate,
5... Step stud, 6... Step section, 8... Spring, 1
1, 12...Fixed terminal, 13...Protrusion, 14...
...Housing, 16... Convex portion, 17... Long hole.

Claims (1)

[Scope of Claims] 1. A switching piece having a stepped portion and rotating in conjunction with the operating shaft of the rotary electronic component, and a long hole that engages with and disengages from the stepped portion of the switching piece, and is bored in the direction of the switching piece, A switching plate that rotates as a fulcrum by inserting a step stud into the elongated hole, a protrusion provided on the housing so as to come into contact with a protrusion provided at one end of this switching plate, and A rotating electronic component comprising a spring whose one end is attached to the switching plate so as to be biased and move the switching plate in the long diameter direction of the elongated hole, and a fixed terminal that comes into contact with and separates from the switching plate. Attached switch. 2. Claim 1 in which the protruding portion of the switching plate and the convex portion of the casing are constituted by a curved surface or an oblique portion.
Attached switch for rotary electronic components listed in section.